超声速流体密度场的全息干涉测量

介绍一种基于全息干涉计量原理、应用数字图像处理系统, 精确测量风洞超声速叶栅流场中流体密度分布的新方法。整个测量过程中测量仪器对流场没有机械扰动, 还具有测量精度高、数据获取、处理方便, 能同时获得流体全场信息等优点。给出了用该方法所获得的超声速叶栅流场的全场密度分布结果。 

MATCHING OF PLAIN INJECTOR FUEL DISTRIBUTION WITH BARCHANE DUNE FLAMEHOLDER

Abstract The effects of air stream velocity,fuel injector pressure drop and flameholder radial position on fuel distribution of vertical spraying from a plain orifice injector in high speed transverse air stream are experimentally investigated for a barchane dune flameholder.The fuel concentration distribution is measured by means of heating sampling probe and infrared analyzer.The experimental data are compared to the fuel distribtuion of horizontal spraying from the injector.The rcsults show that the vertical spraying is superior to the horizontal one in matching with the barchane dune flameholder,and the manner of fuel spraying relative to air stream is the key factor for fuel distribution to match barchane dune flameholder well.